Tramway-grip.



F. W. GRIGE.

TRAMWAY GRIP.

APPLICATION FILED MARJB, 1911. 1,007,565 1 5 SHEETSSHEET l.

O 3 M0 1 j 44 m o o o 0 o o o o o O o o o o O o O o 0 o o o 0 l 0 0 o oo o O 0 o o o o o o Q o o O O p I 0 WWW CIWWMWA ooumnu PIANOGIAIH 50-,WASHINGTON, D. C.

Patented 001;.31, 1911.

Patented 0st. 31, 1911.

5 SHEETB-SHEBT 2.

COLUMBIA PLANOGRAPH 60.,WA5HINQTON. D. c.

F. W. GRIGE. TRAMWAY GRIP. APPLICATION FILED MAR.13,1911.

1,007,561. Patented 001. 31, 1911.

5 SHEETSBHEET 3. 9 Fl( -0 EDLL'MBIIA PLANOGRAPH 20., WASHINGTON, D. c.

F. W. GRIGEf TRAMWAY GRIP.

APPLICATION FILED MAR.13,1911.

5 SHEETSSHEET 4.

Patented Oct. 31, 1911.

COLUMBIA FLANOGRAPH 60., WASHINGTON. D. C.

F. W.v GRIGE.

TRAMWAY GRIP.

APPLICATION FILED MAR.13,'1911.

5 SHEBTSHEET s.

Patented Oct. 31, 1911.

y? 3mm Wm (7%(75M M? W r COLUMBIA PLANOORAPH COqWASHlNO'ID D- C.

UNTTED STAT .1

arn'r GEE on.

FREDERICK w. GR OE, OF ST. LOUIS, MISSOURI, ASSIGNOR TO BRODERICK &BASCOM ROPE COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

TRAMWAY-GRIP.

To all whom it may concern;

Be it known that I, FREDERICK 1V. GRICE, a citizen of the United States,residing at the city of St. Louis, State of Missouri, have inventedcertain new and useful Improvements in Tramway-Grips, of which thefollowing is a specification.

This invention relates to improvements in grips for tramway-buckets, andhas for its primary object to provide an improved grip of this characterthat is adapted for automatically gripping and, also, for automaticallyreleasing the traction-rope of an aerial tramway.

Another object of the present invention resides in the provision ofpositive means for causing the grip to clamp the tractionrope.

Further this invention consists of the novel construction andarrangement of parts, hereinafter more fully described and pointed outin the claims.

In the accompanying drawings forming part of this specification, inwhich like numbers of reference denote like parts wherever they occur,Figure l is a perspective View of attached thereto; Fig. 2 is a frontelevation, on an enlarged scale, of the grip and part of thebucket-frame; Fig. 3 is a side elevation of same, the bucket-frame beingshown in section; Fig. 4 is a side elevation of the drum or grip-body;Fig. 5 is an end elevation of same; Fig. 6 is a top plan view, on anenlarged scale, of the shaft; Fig. 7 is a side elevation of same; Fig. 8is a sectional view on the line 88, Fig. 2; Fig. 9 is a diagrammaticalview showing means for automatically uncoupling the grip from thetraction-rope; and Fig. 10 is a diagrammatical view showing means forautomatically coupling the grip to the traction-rope and, also, positivemeans for causing the grip to clamp the traction-rope tightly.

The bucket 1, which may be of any desired construction, is supported bypendants 2 that are secured to the pendant-head 3 by any ordinary means,said pendant-head being fastened to the trolley-beam 4 to which thetrolley-sheaves 5 that travel upon the track-cable 6 are attached in theusual man ner. Braces 7 and 8 connect the pendants 2 Specification ofLetters Patent.

Application filed March 13, 1911.

Patented Oct. 31, 1911. Serial No. 614,003.

and thereby strengthen the structure, being riveted or otherwise securedto said pendants and being spaced apart so as to allow a journal-bearing9 to be located therebetween. Said journal-bearing preferably consistsof two parts 10 that bear flanges 11, and is preferably locatedcentrally between the braces 7 and 8. Bolts 12 or the like connect thebraces 7 and-8 and pass through openings in the flanges 11 of parts 10of the journal-bearing 9, thereby not only securing said journal-bearingfirmly to said braces, but holding the parts 10 of said journalbearingfirmly together. The parts 10 of the journal-bearing 9 fit in an annulargroove 13 that is formed in the periphery of the hollow cylindrical drumor grip-body 14 and thereby prevent longitudinal movement of said drumin said journal-bearing. The

. drum 14 is capable of revolving in the j ournalbearing 9, and, inorder that said journal-bear1ng can be lubrlcated, perforations 15 and16 are formed in brace 7 and one of p the parts 10 of saidjournal-bearing, respectively, said perforations, of course, communicating with each other. a tramway-bucket having my improved grlp Ashaft 17 extends through the hollow drum 14 and is not only capable ofrotating but can move longitudinally in said drum in the mannerhereinafter described. Said drum contains a perforation 18 to permit theshaft 17 to be lubricated, said perforation being screw-threaded toreceive a plug 19, which prevents dirt and grit from entering saidperforation. One end of shaft 17 bears a reduced projection 20 whichextends through an opening in lever 21, said opening being preferablynearer the lower end of said lever than the upper end thereof. The lever21 is adjustably secured to the projection 20 by a setscrew orset-screws 22 or other suitable means, and affords a means by which theshaft 17 is rotated. A roller or counterweight 23 is pivotally attachedto the upper end of the lever 17 by a bolt 24 or other suitable means.The other end of the shaft 17 bears a reduced projection 25 in which anannular groove 26 is formed in the periphery thereof. A jaw 27, whichextends transversely of the end of the shaft 17, contains a depressionor opening 28, in which the projection 25 extends, and fits against theshoulder 29 on said shaft. Said jaw is revolubly mounted on theprojection 25, and is held in place thereon by a bolt or screw 30 or aplurality of such bolts or screws, each of said bolts or screws beinarranged so that one end thereof projects into the groove 26 in saidprojection 25. A groove 31, which is preferably V-shaped, is formedlongitudinally in the face of the jaw 27 and is preferably arranged toextend through and, also, transversely to the axis of rotation of shaft17.

An extension 32 from the drum 14 extends over the jaw 27 and bears a jaw33, which extends transversely of the end of shaft 17. The jaw 33 facesthe jaw 27 and contains a groove 34, which extends longitudinally in theface thereof. A lining or block 35 fits in the groove 34 and is held inplace therein by a bolt or bolts 36. A groove 37, which is preferablyV-shaped, is formed in the face of said lining or block and extendslongitudinally thereof, being preferably arranged to extend through and,also, transversely to the axis of rotation of shaft 17. A projection orenlargement 38 borne by the jaw 27 protrudes into a depression 39 in thelower face of the extension 32, and the sides of said extension extendover the ends of said jaw and, also, in close'proximity thereto so as tohold said jaw in such position that the groove 31 in said jaw is at alltimes substantially parallel to the groove 37 in the lining 35. Thetraction or pulling rope 40 extends longitudinally between. the jaws 27and 33, and is held firmly in the grooves 31 and 37 in the mannerhereinafter de scribed. In order that the rope 40 can readily enter thespace between the jaws 27 and 33, the lower edges of the faces of saidjaws are beveled at 41 and 42, respectively. Due to the fact that thegrooves 31 and 37 extend through the axis of the shaft 17, the rope 40,also, extends through the axis of said shaft and, by this arrangement,said rope is prevented from exerting any torsional stresses upon saidshaft. Lugs 43 project from opposite sides of the extension and supporta pair of pins 44, each of said pins having a roller 45 mounted thereonand being held in place by a cotter or cotters 4G or other suitablemeans. The rollers 45 extend transversely over the rope 40 and touch ornearly touch same when said rope is clamped in the grooves 31 and 37. Byreason of the jaw 27 being swiveled to the end of shaft 17 and, also, ofthe drum 14 being revoluble in the journal-bearing 9, the jaws 27 and 33are free at all times to adjustthemselves to the rope 40, 2'. 6., whilethe rope 40 is gripped between the jaws 27 and 33, said jaws remainparallel to the rope 40, whether said rope travels horizontally orinclines at an angle to the horizon, or whether said rope changes thedirection of lts course of travel.

When the rope 40 enters the space between the jaws 27 and 33, therollers 45 ride upon said rope and thereby adjust the positions of saidjaws so that said rope can readily find its place in the grooves 31 and37. The jaw 27 and the lining 35 can be removed so that another jaw 27having a larger or smaller groove 31 and another lining 35 having alarger or smaller groove 37 can be substistuted therefor, in order toafford means for gripping a larger or a smaller rope 40.

A helical groove 47, which is formed in the periphery of the shaft 17,extends from one end of said shaft to within a short distance of theother end thereof and, at a point or points on the periphery of saidshaft, said groove changes from a fine pitch to a coarse pitch. Thecoarse pitch of the groove 47 is preferably wider than the fine pitch ofsaid groove, in order to allow the lug or lugs 48, projecting from theinner face of drum 14, to pass from the fine pitch into the coarse pitchand vice versa. It is preferable, however, to provide the drum 14 with apair of lugs 48, one of said lugs being located in the upper part ofsaid drum and being arranged to extend between either the sides 49 of afine pitch part of groove 47 or the sides 50 of a coarse pitch part ofsaid groove, and the other of said lugs being located in the lower partof said drum and being arranged to extend between either the sides 51 ofanother fine pitch part of groove 47 or the sides 52 of another coarsepitch part of said groove. The sides 52 connect with the sides 49, andthe sides 50 connect with the sides 53 of a third fine pitch part ofgroove 47, said sides 53 connecting with the sides 54 of a third coarsepitch part of said groove that extends to the end of shaft 17, in orderto allow said shaft to be inserted into or removed from the drum 14. Thelugs 48 are arranged so that, when the shaft 17 is rotated, the sides 49and 50 move in engagement with the upper lug 48 at the same time thesides 51 and 52 move in engagement with the lower lug 48, respectively.An annular groove 55 is formed in the inner surface of drum 14, andcommunicates with the perforation 18 in order to allow the lubricantthat enters said perforation to flow to both lugs 48. The lever 21 is soarranged relative to the groove 47 that, when the lever is rotated in aclockwise direction from the horizontal position to the verticalposition or in a counter-clockwise direction from the vertical positionto the horizontal position, Fig, 2, the sides 49 and 51 of the finepitch parts of the groove 47 move in engagement with the lugs 48,thereby causing the aw 27 to move slowly away from or toward the jaw 33,in order to diminish or increase the pressure of said jaws upon the rope40. hen the lever is rotated in a clockwise direction from the verticalposition, Fig. 2, until limited by the stop 56 borne by a pendant 2 or,when said lever is rotated in a counter-clockwise direction from saidstop to the vertical position, the sides 50 and 52 move in engagementwith the lugs 48, whereby the jaw 27 is moved quickly away from ortoward the jaw 33, so as to release or grip the rope-.40. When the rope40 is released the lever 21 rests on the stop 56, which is preferablyarranged so that said lever inclines approximately at an angle offorty-five degrees from the horizontal, on one side of the verticalposition, but, when the rope is gripped tightly between the jaws 27 and33, the lever 21 occupies a position between the vertical and thehorizontal positions, on the side of the vertical position that isopposite the stop 56, said gripping position being determined by thesize of the rope 40 and, also, by the extent to which the lever 21 isdepressed in the manner hereinafter described.

In order to uncouple the grip from the rope 40 or to couple same to saidrope, the lever 21 may be rotated either automatically or manually. InFig. 9, a means for automatically rotating the lever 21 in the properdirection to uncouple the grip from the rope 40 is depicted for thepurposes of illustration, but it should be understood that any othersuitable means may be provided. The rope 40 travels in the directionindicated by the arrow, Fig. 9, and draws the bucket 1 in the samedirection, when the lever 21 occupies a position to cause the jaws 27and 33 to grip said rope tightly, as hereinabove described. At the pointwhere the grip is desired to release the rope 40, an inclined guide rail57 or the like is disposed in the path of travel of the roller 23. Therail 57 is bent to slope upwardly from both ends thereof to the middleor nearly the middle part of same so that when the roller 23 reaches therail 57, said roller rides up the inclined surface 58 of said rail andthereby rotates the lever 21 in a clockwise direction, Fig. 9, untilsame reaches the vertical position, at which time the roller 23 engagesthe deflector 59, which causes the lever 21 to rotate further in aclockwise direction, in order to allow said roller to ride down theinclined surface 60 of said rail. When the lever 21 is rotated to thevertical position, by reason of roller 23 riding up the inclined surface50, the pressure of the jaws 27 and 33 upon the rope 40 is onlydiminished, but, when the lever 21 is rotated from the verticalposition, by reason of roller 23 riding down the inclined surface 60,the jaws 27 and 33 release the rope 40, as hereinabove described,whereby the bucket is free to remain at rest and, also, the rope 40 isfree to travel without pulling the bucket with same. After the rope 40is released, the bucket 1 is free to be moved upon a switch-rail 61, theends of which connect with the track-rope or trackropes 6, and the lever21 rests on the stop 56 until same is rotated, in the manner about to bedescribed, in order to couple the grip to said rope.

At any point where it is desired to couple the grip to the rope 40, ablock or stop 62 is disposed in the path of travel of the lower end ofthe lever 21. With the lever 21 resting on the stop 56, the operatormoves the bucket 1 in the same direction in which the rope 40 travels,as indicated by the arrow, Fig. 10, in order to bring the lower end ofthe lever 21 into engagement with the block 62 borne by a suitablesupport 63. Adjacent the point where the grip is coupled to thetraction-rope 40, the switch-rail 61 slopes downwardly at 61 and extendsparallel or nearly parallel to said rope and then slopes upwardly at 61The traction-rope 40 travels parallel or nearly parallel to theswitchrail proper, and, when the bucket 1 is moved along said rail so asto travel down the inclined part 61 the traction-rope 40 enters thespace between the jaws 27 and 33 and the rollers 45 come in contact withsaid traction-rope, whereby said rope finds its place between thegrooves 31 and37, in the manner hereinabove described, before the lowerend of lever 21 engages the block 62. The engagement of the block 62with the lower end of lever 21 causes the lever to rotate in acounter-clockwise direction, Fig. 10. When the lever rotates fromengagement with the stop 56, to the vertical position, the jaw 27 forcesthe rope 40 in place in the grooves 31 and 37. After the leverpasses tothe left of the vertical position, the roller 23, by its weight and,also, by its momentum acquired by reason of lever 21 being rotated asjust described, causes said lever to rotate further, in order to causethe 27 to move closer to the jaw 33, thereby clamping the rope 40tightly in the grooves 31 and 37 until the friction between said ropeand said grooves becomes sufiicient to cause said rope to pull thebucket 1 with same. A member 64 is pivoted at 65 to a member 66 fastenedto a suitable support 67, and, from said member 66, the member 64 slopesdownwardly in the path of travel of the roller 23. The free end ofmember 64 curves upwardly in order to extend out of the path of travelof the roller 23, and is supported by a link 68, which is pivotallyattached thereto and, also, to a le-- ver 69, pivoted at 70 tothesupport 67. A weight 71 is slidably mounted on the lever 69 and isheld in any desired position thereon by means of a set-screw 72. Theweight 71 holds the lever 69 normally against-a pin or stop 73 that isattached to the support 67 and thereby holds the member 64 in the pathoftravel of the roller 23. After the rope 40 is clamped between the jaws27 and 33, as hereinabove described, same pulls the bucket in thedirectionindicated by the arrow, Fig.

10, with the result that roller 23 passes beneath the member 64 and,also, in engagement therewith, thereby raising said memher, which, inturn, forces the link 68 and lever 69 upwardly. While the roller 23passes beneath the member 64 the weight 71 presses downwardly upon themember 64 and thereby depresses the roller 23, with the result that thelever 21 is rotated further in the proper direction to cause the jaws 27and 33 to clamp the rope tighter. By reason of the free end of member 64being curved as hereinabove described, the pressure of said member uponthe roller 23 is released gradually while said roller passes out ofengagement with same, the result being to leave the lever 21 in positionto clamp the rope firmly between the jaws 27 and 33. When the roller 23passes out of engagement with the member 64, said member is returned toits normal position by the pressure of weight 71. Due to the fact thatthe weight 71 is adjustably attached to lever 69, same can be movedtoward or away from the fulcrum point 7 O, in order to diminish or toincrease the pressure upon the roller 23. The member 64 thus affords ameans by which the lever 21 is rotated sufliciently to clamp the rope 4Ofirmly between the jaws 27 and 33, in case the roller 23 does not causesaid lever to rotate to the proper position to clamp the rope tightlybetween the jaws 27 and 33 in the manner hereinabove described.

The operation of the device is as follows: When it is desired touncouple the grip from the traction-rope 40, the lever 21 is ro tated ina clockwise direction, Fig. 2, from the clamping position on theleft-hand side of the vertical position to the unclamping position onthe right-hand side of the vertical position, i. 6., resting on the stop56, as hereinabove described. The shaft 17 rotates with the lever 21 andcauses the sides 49 and 51 of the groove 47 to move in engagement withthe lugs 48 until the sides 50 and 52 of said groove come in contactwith said lugs, after which only the sides 50 and 52 move in engagementwith said lugs. lVhile the sides 49 and 51 move in engagement with thelugs 48, the shaft 17 draws the jaw 27 slowly away from the jaw 33, withthe result that the pressure of said jaws upon the rope 40 is reduced.When the sides 50 and 52 move in engagement with the lugs 48, the shaft17 draws the aw 27 quickly away from the jaw 33, whereby the rope 40 isreleased entirely. In order to couple the grip to the traction-rope 40,the lever 21 is rotated in a counter-clockwise direction, Fig. 2, fromthe unclamping position or position of rest upon stop 56 to the clampingposition, as hereinabove described, whereby the shaft 17 rotatestherewith and causes the sides 50 and 52 to move in engagement with thelugs 48 until the sides 49 and 51 come in contact with said lugs, afterwhich the sides 49 and 51 move in engagement with said lugs and remainin engagement with said lugs, when the lever 21 occupies the clampingposition. \Vhen the sides 50 and 52 move in engagement with the lugs 48,the shaft 17 forces the jaw 27 quickly toward the jaw 33 and therebyforces the rope into place in the grooves 31 and 37, after which thesides 49 and 51 move in engagement with the lugs 48, with the resultthat shaft 17 presses the jaw 27 further toward the jaw 33, whereby therope 40 is clamped firmly in the grooves 31 and 37.

I claim:

1. A tramway grip comprising a journal bearing, a hollow memberrevoluble therein and provided with a fixed jaw, a shaft fitted in saidmember and provided with a jaw arranged for cooperation with thefirstnamed jaw, and means for imparting an endwise bodily movement tosaid shaft in either direction for causing the second-named jaw toapproach or recede from said first-named jaw.

2. A tramway grip comprising a journal bearing, a hollow memberrevoluble therein and provided with a fixed jaw, a shaft revolublyfitted in said member and arranged for bodily longitudinal movementduring its revolution, a jaw carried by said shaft for cooperation withthe first-named jaw, and means for revolving said shaft.

3. A tramway grip comprising a hollow member provided with an integralextension formed with a jaw, a shaft revolubly fitted in said member andarranged for bodily longitudinal movement during its revolution, a jawcarried by said shaft for cooperation with the first-named jaw, andmeans for revolving said shaft.

4. A tramway grip comprising a hollow member provided at one end with alongitudinal extension terminating in a lateral jaw, a shaft fitted insaid member and provided at one end with a jaw confronting thefirst-named jaw for cooperation with the same, and means for impartingan endwise bodily movement to said shaft in either direction for causingthe second-named jaw to approach or recede from said firstnamed jaw.

5. A tramway grip comprising a hollow member having a jaw fixed thereto,a shaft having a cam groove in its periphery and being revoluble in saidhollow member, a lug projecting from said member into the groove in saidshaft, thereby to cause said shaft to move longitudinally when rotated,and a jaw swiveled to an end of said shaft and being movable toward and.away from said fixed jaw.

6. A tramway grip comprising a hollow member having a jaw fixed thereto,a shaft having a cam groove in its periphery and being revoluble in saidhollow member, a lug projecting from said member into the groove in saidshaft thereby to cause said shaft to move longitudinally when rotated,and a jaw swiveled to an end of said shaft and being movable toward andaway from said fixed jaw, said swiveled jaw being detachable.

7 A tramway grip comprising a hollow member having a jaw fixed thereto,a shaft having a cam groove in its periphery and being revoluble in saidhollow member, a lug projecting from said hollow member into the groovein said shaft, thereby to cause said shaft to move longitudinally whenrotated, and a aw swiveled to an end of said shaft and being movabletoward and away from said fixed jaw, said groove having a fine pitchhelical part and, also, a coarse pitch helical part.

8. A tramway grip comprising a hollow member having a aw fixed thereto,a shaft having a cam groove in its periphery and being revoluble in saidhollow member, said groovehaving fine and coarse pitch helical parts, apair of lugs projecting from said hollow member into the groove in saidshaft,

thereby to cause said shaft to move longi tudinally when rotated, and ajaw swiveled to an end of said shaft and being movable toward and awayfrom said fixed jaw.

9. A tramway grip comprising a hollow member having a jaw fixed thereto,a shaft having a cam groove in its periphery and being revoluble in saidhollow member, said groove having fine and coarse pitch helical parts, aplurality of lugs projecting from said hollow member into the groove insaid shaft, thereby to cause said shaft to move longitudinally whenrotated, and a jaw swiveled to an end of said shaft and being movabletoward and away from said fixed jaw.

10. A tramway grip comprising a hollow member having a jaw fixedthereto, a shaft having a cam groove in its periphery and beingrevoluble in said hollow member, said groove having fine and coarsepitch helical parts, lugs projecting from said hollow member into thegroove in said shaft, thereby to cause said shaft to move longitudinallywhen rotated, a jaw swiveled to one end of said shaft and being movabletoward and away from said fixed jaw, and a lever attached to the otherend of said lever for actuating same.

11. A tramway gripcomprising a hollow memberhaving a jaw fixed thereto,a shaft having a cam groove in its periphery and being revoluble in saidhollow member, said groove having fine and coarse pitch helical parts,lugs projecting from said hollow memher into the groove in said shaft,thereby to cause said shaft to move longitudinally when rotated, a jawswiveled to one end of said shaft and being movable toward and away fromsaid fixed jaw, a lever attached to the other end of said lever foractuating same, and a counterweight borne by said lever.

12. A tramway grip comprising a hollow member having a jaw fixedthereto, said jaw having a groove in its face, a shaft having a camgroove in its periphery and being revoluble in said hollow member, saidcam groove having fine and coarse pitch helical parts,

lugs projecting from said hollow member into the groove in said shaft,thereby to cause said shaft to move longitudinally when rotated, and ajaw swiveled to one end of said shaft and being movable toward and awayfrom said fixed jaw, the face of said swiveled jaw having a grooveextending substantially parallel to the groove in said fixed jaw.

13. A tramway grip comprising a hollow member having a jaw fixedthereto, said jaw having its face grooved, a grooved lining removablysecured in the groove in said jaw a shaft having a cam groove in itsperiphery and being revoluble in said hollow member, said cam groovehaving fine and coarse pitch helical parts, lugs projecting from saidhollow member into the groove in said shaft, thereby to cause said shaftto move longitudinally when rotated, and a jaw swiveled to an end ofsaid shaft and being movable toward and away from said fixed jaw, theface of said swiveled jaw having a groove extending substantiallyparallel to the groove in said lining.

l l. A tramway grip comprising a hollow member having a jaw fixedthereto, said jaw having its face grooved, a grooved lining removablysecured in the groove in said jaw, a shaft having a cam groove in. itsperiphery and being revoluble in said hollow member, said cam groovehaving fine and coarse pitch helical parts, lugs projecting from saidhollow member into the groove in said shaft, thereby to cause said shaftto move longitudinally when rotated, and a jaw swiveled to an end ofsaid shaft and being movable toward and away from said fixed aw, theface of said swiveled jaw having a groove extending substantiallyparallel to the groove in said lining, "the grooves in said lining andsaid swiveled jaw being arranged to extend through and substantially ata rightangle to the axis of rotation of said shaft.

15. A tramway grip comprising a hollow member having an extension fromone end thereof, a jaw borne by said extension, a shaft having a camgroove in its periphery and being revoluble in said hollow member, lugsprojecting from said hollow member into the groove in said shaft,thereby to.

cause said shaft to move longitudinally when rotated, and a jaw swiveledto an end of said shaft and being movable toward and lit) away from saidfixed aw, the sides of said extension being disposed over the ends ofsaid swiveled jaw, thereby holding said swiveled jaw substantiallyparallel to said fixed jaw.

16. A tramway grip comprising a hollow member having an extension fromone end thereof, a jaw borne by said extension, a shaft having a camgroove in its periphery and being revoluble in said hollow member, lugsprojecting from said hollow member into the groove in said shaft,thereby to cause said shaft to move longitudinally when rotated, a jawswiveled to one end of said shaft and being movable toward and away fromsaid fixed jaw, both of said jaws having their lower edges beveled toallow the rope to enter therebetween, said extension being arranged tohold said swiveled jaw substantially parallel to said fixed jaw.

17. A tramway grip comprising a journalbearing, a hollow memberrevoluble therein, a jaw fixed to said hollow member, a shaft having acam groove in its periphery and being revoluble in said hollow member,lugs projecting from said hollow member into the groove in said shaft,thereby to cause said shaft to move longitudinally when rotated, and ajaw swiveled to an end of said shaft and being movable toward and awayfrom said fixed jaw.

18. A tramway grip comprising a journalbearing, a hollow memberrevoluble therein, a jaw fixed to said hollow member, a shaft having acam groove in its periphery and being revoluble in said hollow member,lugs projecting from said hollow member into the groove in said shaft,thereby to cause said shaft to move longitudinally when rotated, a

' jaw swiveled to an end of said shaft and being movable toward and awayfrom said fixed jaw for clamping and releasing the traction-rope, androllers carried by said hollow member adapted to ride upon thetraction-rope, thereby to hold said aws parallel to the traction-rope.

19. A tramway grip comprising a journalbearing, a hollow memberrevoluble therein, a aw fixed to said hollow member, a shaft having acam groove in its periphery and being revoluble in said hollow member,lugs projecting from said hollow member into the groove in said shaft,thereby to cause said shaft to move longitudinally when rotated, a jawswiveled to one end of said shaft and being movable toward and away fromsaid fixed jaw, and a lever adjustably secured to the other end of saidshaft for actuating same.

20. A tramway grip comprising a journalbearing, a hollow memberrevoluble therein, a jaw fixed to said hollow member, a shaft having acam groove in its periphery and being revoluble in said hollow member,lugs projecting from said hollow member into the groove in said shaft,thereby to cause said shaft to move longitudinally when rotated, a

jaw swiveled to one end of said shaft and being movable toward and awayfrom said fixed jaw, a lever adjustably secured to the other end of saidshaft for actuating same, and a counterweight borne by said lever.

21. The combination of a tramway bucket, a frame supporting same, ajournal-bearing secured to said frame, ahollow member revoluble in saidjournal-bearing, a aw fixed to said hollow member, a shaft having a camgroove in its periphery and being revoluble in said hollow member, lugsprojecting from said hollow member into the groove in said shaft,thereby to cause said shaft to move longitudinally when rotated, a jawswiveled to one end of said shaft and being movable toward and away fromsaid fixed jaw for clamping and unclamping the traction-rope, and alever attached to the other end of said shaft for rotating same.

22. The combination of a tramway bucket, a frame supporting same, ajournal-bearing secured to said frame, ahollow member revoluble in saidournal-bearing, a jaw fixed to said hollow member, a shaft having a camgroove in its periphery and being revoluble in said hollow member, lugsprojecting from said hollow member into the groove in said shaft,thereby to cause said shaft to move longitudinally when rotated, a jawswiveled to an end of said shaft and being movable toward and away fromsaid fixed jaw for clamping and unclamping the traction rope, a leverattached to the other end of said shaft for rotating same, and arevoluble counterweight borne by said lever.

23. The combination of a tramway bucket, a frame supporting same, ajournal-bearing secured to said frame, ahollow member revoluble in saidj0urnalbearing, a jaw fixed to said hollow member, a shaft having a camgroove in its periphery and being revoluble in said hollow member,lugsprojecting from said hollow member into the groove in said shaft,thereby to cause said shaft to move longitudinally when rotated, a jawswiveled to one end of said shaft and being movable toward and away fromsaid fixed jaw for clamping and unclamping the traction rope, alever'attached to the other end of said shaft for rotating same, arevoluble counterweight borne-by said lever, and a member attached tosaid frame for supporting said lever, when said lever is in position forholding said swiveled jaw out of engagement with the traction-rope.

24. The combination of a tramway bucket, a frame supporting same, ahollow member revolubly supported by said frame, a jaw fixed to saidhollow member, a shaft revoluble in said hollow member, means for movingsaid shaft longitudinally when rotated, a jaw swiveled to one end ofsaid shaft and being movable toward and away from said 1*:

rooms! revolubly supported by said frame, a jaw fixed to saidhollow-qmember, a shaft re volublein said hollowmember, means for movingsaid shaftv longitudinally when rotated, a lever attached to one end ofsaid shaft for rotating same, a jaw swiveled to the other end of saidshaft and being movable toward and away from said fixed jaw, thereby toclamp the traction-rope, when said lever occupies aclamping position,and

to release the rope when said lever occupies an unclamping position, arevoluble counterweight borne by said lever, a support borne by saidframe for supporting said lever in the unclamping position, means forrotating said lever from the unclamping position to a clamping position.

26. The combination of a tramway bucket, a frame supporting same, ahollow member revolubly supported by said frame, a jaw fixed to saidhollow member, a shaft revoluble in said hollow member, means for movingsaid shaft longitudinally when rotated, a lever attached to one endofsaid shaft for rotating same, a jaw swiveled to the other end of saidshaft and being movable toward and away from said fixed jaw, thereby toclamp the traction-rope, when said lever occupies a clamping position,and to release the rope when said lever occupies an unclamping position,a revoluble counterweight borne by said lever, a support borne by saidframe for supporting said lever in the unclamping position, means forrotating said lever from the unclamping position to a clamping position,and means for depressing said lever after same has been rotated to aclamping position, thereby to clamp the traction-rope tighter.

27. The combination of a tramway bucket, a frame supporting same, ahollow member revolubly supported by said frame, a jaw fixed to saidhollow member, a shaft revoluble in said hollow member, means for movingsaid shaft longitudinally when rotated, a lever attached'to one end ofsaid shaft for rotating same, a jaw swiveled to the other end of saidshaft and being movable toward and away from said fixed jaw, thereby toclamp the traction-rope, when, said lever occupies a clamping position,and to release the rope when said lever occupies an unclamping position,a revoluble counterweight borne by said lever, a support borne by saidframe for supporting said lever in the unclamping position, means forrotating said lever from the unclamping position to a clamping position,and means for depressing. said lever after same has been rotated to aclampingposition, thereby to clamp the traction-rope tighter, saiddepressing means consisting of a pivoted member extending into the pathof travel of said counterweight and having its free end weighted.

28. The combination of a tramway bucket, a frame supporting same, ahollow member revolubly. supported by, said frame, a jaw fixed to saidhollow member, a shaft revoluble. in said hollow member, means formoving said shaft longitudinally when rotated, a lever attached to oneend of said shaft for rotating same, a swiveled to the other end of saidshaft andbeing movable toward and away from said fixed jaw, thereby toclamp the traction-rope, when said lever occupies a clamping position,and to release the rope whenvsaid lever occupies an unclamping position,a revoluble counterweight borne by said lever, a support borne by saidframe for supporting said lever in the unclamping position, means forrotating said lever from the unclamping position to a clamping position,and means for depressing saidlever after same has been rotated to aclamping position, thereby to clamp the traction-rope tighter, saiddepressing means consisting of a pivoted member extending into the pathof travel of said counterweight, the free end of said pivoted memberbeing weighted and curved to extend out of the path of travel of saidcounterweight.

29. The combination of a tramway bucket, a frame supporting same, ahollow member revolubly supported by said frame, a jaw fixed to saidhollow member, a shaft revoluble in said hollow member, means for movingsaid shaft longitudinally when rotated, a lever attached to one end ofsaid shaft for rotating same, a jaw swiveled to the other end of saidshaft and being movable toward and away from said fixed jaw, thereby toclamp the traction-rope, when said lever occupies a clamping position,and to release the rope, when said lever occupies an unclampingposition, a revoluble counterweight borne by said lever, a support borneby said frame for supporting said lever in the unclamping position,means for rotating said lever from the unclamping position to a clampingposition, a support, a member pivoted to said support and extending intothe path of travel of said counterweight, there- 'by to depress saidlever in a clamping position, an arm pivoted to said support, a weightborne by said arm, a link attached to said arm and supporting the freeend of said pivoted member, and a stop borne by said support forlimiting the movement of said arm.

30. The combination of a tramway bucket, a frame supporting same, ahollow member revolubly supported by said frame, a jaw fixed to saidhollow member, a shaft revoluble in said hollow member, means for movingsaid shaft longitudinally when rotated, a lever attached to one end ofsaid shaft for rotating same, a aw swiveled to the other end of saidshaft and being movable toward and away from said fixed jaw, thereby toclamp the traction-rope, when said lever occupies a clamping position,and to release the rope, when said lever occupies an unclampingposition, a revoluble counterweight borne by said lever, a support borneby said frame for supporting said lever in the unclamping position,means for rotating said lever from the unclamping position to a clampingposition, a support, a member pivoted to said support and extending intothe path of travel of said counterweight, there by to depress said leverin a clamping position, an arm pivoted to said support, a weight borneby said arm, a link attached to said arm and supporting the free end ofsaid pivoted member, and a stop borne by said support for limiting themovement of said arm, said weight being adjustably attached to said arm.

31. A tramway grip comprising a hollow member provided at one end with alongitudinal extension terminating in a lateral jaw, a shaft revolublyfitted in said member and arranged for bodily longitudinal movementduring its revolution, a aw swiveled to one end of said shaft andconfronting the first-named jaw for cooperation with the same, and meansfor revolving said shaft,

both of said jaws being provided with grooves adapted to receive thetraction-rope, said grooves extending through and at substantially aright angle to the axis of said shaft.

FREDERICK W. GRIOE.

Witnesses GEORGE G. ANDERSON, GLADYs WVALTON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, I). G.

